Reference sensor for CPR feedback device



FIG. 1 is a top and side perspective view of a reference sensor for CPR feedback device showing our new design;

FIG. 2 is a bottom perspective view thereof.

FIG. 3 is a top view thereof.

FIG. 4 is a bottom view thereof.

FIG. 5 is a side view thereof, the opposite side view being identical.

FIG. 6 is a first end view thereof; and,

FIG. 7 is a second end view thereof.

The broken lines in the drawing views are included for the purpose of illustrating portions of the reference sensor for CPR feedback device that form no part of the claimed design. 

CLAIM The ornamental design for a reference sensor for CPR feedback device, as shown and described. 